A lot of red dots on the calf can be seen in eczema, allergic purpura and other diseases, the patient should consult a doctor in time to clarify the cause of the disease. 1. Eczema: a chronic, inflammatory skin disease, mostly symmetrical distribution, occurs in the calf can be manifested as red dots, and there will be local itching, can be local use of Denard cream and other drugs. 2. allergic purpura: a small blood vessel allergic reaction inflammation, that is, allergens caused by the increase in capillary permeability caused by skin bleeding points, can be manifested as red dots on the calf, acute attack patients should be bed rest. There are many reasons for small red dots on the calf, it is recommended to consult a doctor in time for a clear diagnosis, so as not to delay the condition.